About this Book

The intruder came from BEYOND. A nebulous celestial body as old as the universe itself, it had been born in a vast cloud of ice, rocks, dust, and gas when the outer planets of the solar system were formed 4.6 billion years ago. Soon after its scattered particles had frozen into a solid mass one mile in diameter, it began streaking silently through the emptiness of space on an orbital voyage that carried it around a distant sun and halfway to the nearest stars again, a journey lasting many thousands of years from start to finish.

The comet's core, or nucleus, was a conglomeration of frozen water, carbon monoxide, methane gas, and jagged blocks of metallic rocks. It might accurately be described as a dirty snowball hurled through space by the hand of God. But as it whirled past the sun and swung around on its return path beyond the outer reaches of the solar system, the solar radiation reacted with its nucleus and a metamorphosis took place. The ugly duckling soon became a thing of beauty.

As it began to absorb the sun's heat and ultraviolet light, a long comma formed that slowly grew into an enormous luminous blue tail that curved and stretched out behind the nucleus for a distance of 90 million miles. A shorter, white dust tail more than one million miles wide also materialized and curled out on the sides of the larger tail like the fins of a fish.

Each time the comet passed the sun, it lost more of its ice and its nucleus diminished. Eventually, in another 200 million years, it would lose all its ice and break up into a cloud of dust and become a series of small meteorites. This comet, however, would never orbit outside the solar system or pass around the sun again. It would not be allowed a slow, cold death far out in the blackness of space. Within a few short minutes, its life would be snuffed out. But on this, its latest orbit, the comet passed within 900,000 miles of Jupiter, whose great gravitational force veered it off on a collision course with the third planet from the sun, a planet its inhabitants called Earth.

Plunging into Earth's atmosphere at 130,000 miles an hour on a forty-five-degree angle, its speed ever-increasing with the gravitational pull, the comet created a brilliant luminescent bow shock as its ten-mile-wide, four-billion-ton mass began to break into fragments due to friction from its great speed. Seven seconds later, the misshapen comet, having become a blinding fireball, smashed onto Earth's surface with horrendous effect. The immediate result from the explosive release of kinetic energy upon impact was to gouge out a massive cavity twice the size of the island of Hawaii as it vaporized and displaced a gigantic volume of water and soil.

The entire earth staggered from the seismic shock of a 12.0 earthquake. Millions of tons of water, sediment, and debris burst upward, thrown through the hole in the atmosphere above the impact site and into the stratosphere, along with a great spray of pulverized, fiery rock that was ejected into suborbital trajectories before raining back to earth as blazing meteorites. Firestorms destroyed forests throughout the world. Volcanoes that had been dormant for thousands of years suddenly erupted, sending oceans of molten lava spreading over millions of square miles, blanketing the ground a thousand or more feet deep. So much smoke and debris were hurled into the atmosphere and later blown into every corner of the land by terrible winds that they blocked out the sun for nearly a year, sending temperatures plunging below freezing, and shrouding Earth in darkness. Climatic change in every corner of the world came with incredible suddenness. Temperatures at vast ice fields and northern glaciers rose until they reached between ninety and a hundred degrees Fahrenheit, causing a rapid meltdown. Animals accustomed to tropical and temperate zones became extinct overnight. Many, such as the woolly mammoths, turned to ice where they stood in the warmth of summer, grasses and flowers still undigested in their stomachs. Trees, along with their leaves and fruit, were quick-frozen. For days, fish that were hurled upward from the impact fell from the blackened skies.

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